You could use the qqnorm function to obtain the correlation, as:
> qqp=qqnorm(rstudent(regrname))
> cor(qqp$x,qqp$y)
If you do not want see the plot (as the qq.plot is richer):
> qqp=qqnorm(rstudent(regrname), plot.it=F)
domenico vistocco
Tom Fitzhugh wrote:> Hi,
>
> I am trying to figure out how to get the correlation coefficient for a
> QQ plot (residual plot). So to be more precise, I am creating the plot
> like this:
>
> qq.plot(rstudent(regrname), main = rformula, col=1)
>
> But want to also access (or compute) the correlation coefficient for
> that plot.
>
> Thanks,
>
> Tom
>
> [[alternative HTML version deleted]]
>
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